I believe one is a directive and the other is a function.

:require doesn't need the values to be quoted
 
(:require xyz)

require needs values to be quoted so that they're not evaluated when passed as arguments
 
(require 'xyz)

I could be wrong though.
 
06.12.2013, 18:17, "BillZhang" <jingege...@gmail.com>:
hi all,
What's the differences between those two snippets?
1.
(ns a
  (require [a.b]))
 
2.
(ns a
  (:require [a.b]))
 
They all works in my code!
 
thx~

 

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